Improvement in chimney-cowls



@sind @man naar Usata D. o. BATTEY AND ,CARL L. svENissoN, or T oPEKA, KANSAS.

l Letters Patent No. 93,400, dated August 10, 1869.

IMPROVEMENT IN CHIMNEY-COWLS.

The Schedule referred to in theseLe'tters Patent and making part of the same.

To all lwhomtt may conce/rn;

.Be it known that we, I). G; BATTEY and CARL L. SVENSSON, of rIopeka, in the county of Shawnee, and State of Kansas, have invented' anewand useful Improvement in Ghimney-Oowls; 'andi we do hereby deelare that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of 'this specification.

This invention relates to chimney-cowls77 and chimneys; and

It consists in 'the construction and combination as will be hereinafter described.v

In the accompanying sheetof drawing- Figure 1 represents a vertical section of a chimneycowl constructed according to our invention, showing the parts of which it is composed in their proper position.

Figure 2 is' a top view of the same.

Similar letters of reference indicate corresponding parts.

A represents the stationaryportion of the chimney, projecting from the roof ofthe building.

B is a revolving elbowor cord, supported on the Spindle G.

This spindle passes down through a horizontal bar, D, which is fixed in the chimney, and rests on a pivot onthe stepbar E, also fixed in the chimney.

F is a horizontal tube in the horizontal portion of the elbow, which is about half 'the'diametcr of the elbow, passing through and across the upright portion, as Y seen in the drawing.

G is a funnel on the outer end ofthe tube F, which is always turned to 'the wind, so that there is a current of air through the tube Fwhen there. is a fire below, and a current oi' smoke and heated gases passing up the chimney. This occurs whether there is a wind or not, as the rareied air, discharging from the elbow in the dir ction of the arrow, will cause a current through lf, and t iis current will always assist the upward current, as such a currentA will tend to produce a partial vacuum below by accelerating the discharge from the elbow.

lt should be observed that the extension of the tube F completely across or beyond the top of the vertical portion of the elbow will eiectually prevent the wind', when suddenly shifted, from turning down the chimney, as would occur were the tube made shorter, or terminated about the centre of the mouth of said vertical part of the elbow. Another diiiiculty would also arise from the latter construction, viz, the air entering the funnel-tube, instead of passing directly through it, would be partially arrested or greatly impeded in its passage by striking against the shoulders formed by the junction of the horizontal and vertical parts oi' the elbow, thus hindering instead of promoting the escape of the products of combustion.

The elbow or cowl is kept to the wind by means of the vane H, whichis wedge-shaped, as seen in iig. 2. Experience has proved that this form of vane is far preferable to the dat vane ordinarily used for this purpose, as it keeps the cowl or elbow more steady, and in the proper position.

' Where the chimney passes through the roof, it is fastened in any suitable manner, and the roof is protected from danger by means ot' the annular space I Aaround the stove-pipe J.

K is a collar, beneath which are orifices for producingy a circulation of air from below through the annular space I, for the protection oi' the roof or for purposes of ventilation.

,Having thus described our invention,

What we claim as new, and desire to secure by Letters Patent, is-

The chimney A, provided with the collar K and perforations a in its lower end, combined with the pipe J and rotating elbow B, havingthe V- shaped vane H and tube 'E G, the latter being extended across beyond the vertical portion of theelbow B, all constructed and arranged as herein shown and described, for the purpose specified.

The above specification of our invention signed by us, this day of 1869. l). C. BATTEY.

CARL L. SVENSSON.

Witnessesz DAvID BuooKwAY, Lustre DURLEY. 

